Web3 space is maturing rapidly. Developers need mature processes and toolsets to deliver solution effectively. Project Manager can bring in same. However, they need evolve along with the new industry to sound relevant. More tech savvy you are the better.

PMs should be able to effectively evaluate and deploy the right tools and techniques depending on the project need and team preference.

Governance Structure - 
As the product/ project scale, it needs a robust governance structure for efficient operation to ensure predictable output. This translates to
• Effective risk management to properly track, monitor, and resolve key risks.

• Work structuring and prioritization to ensure the team is always working on the highest priority tasks. 
• Stakeholder engagement to ensure key people have all the right info at their fingertips to make the right decisions.

These are few key aspects to just give the flavour. It can be tailored and expanded while discussing specific role or requirements.

So, what project managers can bring to the table?
Toolsets and Methodologies
Working experience with various methodologies (Agile, Waterfall, Hybrid, etc.), frameworks (Scrum, SAFe, Prince2, etc.), and tools (JIRA, Monday.com, Mural, Trello, etc.).